The 12-factor app is a methodology for building software-as-a-service (SaaS) applications that are designed to be deployed in the cloud. It was developed by Heroku, a cloud platform-as-a-service (PaaS) provider, as a way to provide guidelines for building cloud-native applications that are easy to deploy, scale, and maintain. Spring Boot is a Java-based framework for […]
Continue reading1. Overview In this article, we will discuss the username’s case-sensitivity in in-memory authentication. And, find out the reason why the login will be successful even though our username’s case not matched. 2. Configure
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@Override protected void configure(AuthenticationManagerBuilder auth) throws Exception { // add our users for in memory authentication UserBuilder users = User.withDefaultPasswordEncoder(); auth.inMemoryAuthentication() .withUser(users.username("john").password("test123").roles("EMPLOYEE")) .withUser(users.username("smith").password("test123").roles("EMPLOYEE", "MANAGER")) .withUser(users.username("alex").password("test123").roles("EMPLOYEE", "ADMIN")); } |
All the usernames are in lowercase here. But, we can able to login with “John” or “JOHN” or “john”. 3. Either case […]
Continue reading1. Overview In this article, we will check which connection pool is being used in our Spring Boot application. In Spring Boot, By annotating with @Autowired for the javax.sql.DataSource, we can get which database connection pool is using in the currently running application. 2. Tomcat pooling – Default Here’s the program to print the current […]
Continue readingWhat is the issue? type Exception report message There is no PasswordEncoder mapped for the id “null” description The server encountered an internal error that prevented it from fulfilling this request. exception
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java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id "null" org.springframework.security.crypto.password.DelegatingPasswordEncoder$UnmappedIdPasswordEncoder.matches(DelegatingPasswordEncoder.java:236) org.springframework.security.crypto.password.DelegatingPasswordEncoder.matches(DelegatingPasswordEncoder.java:196) org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter$LazyPasswordEncoder.matches(WebSecurityConfigurerAdapter.java:593) org.springframework.security.authentication.dao.DaoAuthenticationProvider.additionalAuthenticationChecks(DaoAuthenticationProvider.java:86) org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:166) org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:174) org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:199) org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:94) org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:124) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) |
Background If we are putting together a demo or a sample, it is a bit cumbersome to take time to hash the passwords of your […]
Continue reading1. Overview Only one shared instance of a singleton bean is managed, and all requests for beans with an id or ids matching that bean definition result in that one specific bean instance being returned by the Spring container. (Default) Scopes a single bean definition to a single object instance per Spring IoC container. – Spring Reference […]
Continue readingWould you like to select all starters dependencies from Spring Initializer http://start.spring.io/ and work offline? Follow these steps: Go to Spring Initializer http://start.spring.io Click on “Switch to the full version”. Manually select all the dependencies (or) Run the below script (to select all) on Developer Tools -> Console (Chrome browser) Click on Generate Project Open the Project […]
Continue reading1. Overview How many times we had created new class with the main method just to write and execute a little snippet of code to test some feature? In Java9 this is now a simple operation with the introduction of JShell. 2. What is JShell? JShell is a Java read-eval-print loop (REPL) tool first introduced […]
Continue readingTo enable https (SSL) for spring boot application on the embedded Tomcat, we need to follow these steps. Get a SSL certificate Enable HTTPS in Spring Boot 1.Get a SSL certificate: To get SSL digital certificate for our application we have two options Generate self-signed certificate on our own (It isn’t a good option in […]
Continue reading1. Overview Existing projects which are started with Java 5/6 and later migrated to Java 7 and Java 8 throws IllegalArgumentException while sorting the list. Here we will try to reproduce the issue and see the quick fix and fix. 2. Reproduce the issue Run the below code few times (we may not reproduce the […]
Continue reading1. Overview A singleton class ensures that only one instance of that class is created. To ensure point of access, the class controls instantiation of its object. Singleton classes are found in many places in JDK (Java Development Kit), such as java.lang.Runtime. The Singleton class offers two things: one and only one instance of the […]
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